When someone with the influenza virus inserts his penis into a healthy recipient's mouth and holds it there for at least five seconds. It is only considered a Reverse Flu Shot if the recipient gets the flu within 48 hours.
Spencer: Here, put this under your tongue.
Cindy: What is it?
Spencer: My dick. I'm giving you a reverse flu shot.
Cindy: Oh, haha. Cool.
Cindy: What is it?
Spencer: My dick. I'm giving you a reverse flu shot.
Cindy: Oh, haha. Cool.
by thecrocheter January 8, 2015
The last shot you'll ever need, under The Patient Protection and Affordable Care Act. May contain lead and/or copper, will leaves trace GSR at the injection site.
Dude, your dad turned 70? Might as well sign him up for his shovel-ready flu shot now...
Bro, that shovel-ready flu shot is KILLER!
Bro, that shovel-ready flu shot is KILLER!
by geekthang November 2, 2012
Just as your ready to finish your grab your partner head take the tip of your penis and put it up to their nose and shoot your load up it.
by JJ AND BG November 4, 2021